What material are these JE Pistons made from?

These pistons are forged from 2618 aluminum. This material is chosen for its high tensile strength, which is necessary for high-demand performance applications like racing engines.

What is the Forged Side Relief (FSR) design?

The FSR design is a proprietary forging from JE Pistons that helps minimize friction and power loss. It achieves this through a reduced skirt width and a shorter wrist pin, which also contributes to saving weight.

Are these pistons compatible with all LS engines?

This set is designed for LS engines and features a 4.010 inch bore. You should confirm that this bore size and the other specifications, such as compression distance and pin diameter, match your specific engine build requirements for proper fitment.

JE Pistons Forged Piston Set 312122 - LS Engine

Name: JE Pistons LS ASYM DM 4100STRKR Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-ls-asym-dm-4100strkr-set-of-8-pistons-t14-296295
Price: 975.74 USD
Availability: BackOrder

JE Pistons LS ASYM DM 4100STRKR Set of 8 Pistons

$975.74

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

JE Pistons LS ASYM DM 4100STRKR Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand LS engine builds.

Key Features

Fits LS engines with a 4.010 inch bore.
Set includes 8 forged pistons.
Forged in the USA from 2618 aluminum for high tensile strength.
Proprietary Forged Side Relief (FSR) design minimizes friction and power loss.
Features a 1.065 inch compression distance and a 0.927 inch pin diameter.
May include an accumulator groove to reduce ring flutter and improve ring seal.

This piston set is designed for LS engines. Please verify bore size and other specifications match your specific engine build requirements.

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Product Details

If you're building a high-performance LS engine for racing or serious street use, a strong set of pistons is crucial. This JE Pistons LS ASYM DM 4100STRKR set is built to handle the demands of boosted or naturally aspirated performance applications. They're forged in the USA using 2618 aluminum, a material known for its high tensile strength, making these pistons well-suited for high-stress environments where durability is key.

JE Pistons has been making performance pistons for over 75 years, and this set incorporates some advanced design features. The proprietary Forged Side Relief (FSR) forging design helps minimize friction and power loss by using a reduced skirt width and a shorter wrist pin, which also saves weight. Depending on the specific application, these pistons may also feature an accumulator groove to help manage combustion gas pressure, reducing ring flutter and improving ring seal for consistent power delivery. Some applications also include a skirt coating to further reduce friction and wear on the piston skirts and cylinder walls, which can also lead to quieter operation.

This set includes eight pistons, each designed specifically for the LS engine platform to optimize performance and durability. They feature a 4.010 inch bore size, a 1.065 inch compression distance, and a 0.927 inch pin diameter. Please note that these pistons are not CARB approved and cannot be shipped to California. For serious LS engine builds, these JE Pistons offer a well-built foundation.